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The Chessboard Sun, Nov 28, 1971 – Page 44 · Asbury Park Press (Asbury Park, New Jersey) · Newspapers.com
The Chessboard: Petrosian Takes New Tack by Harry T. Conover
In the seventh game of their Buenos Aires match, Tigran Petrosian of the Soviet Union led Bobby Fischer of the United States into an uncharted line as Black in a Sicilian Defense, but found the American more than equal to the occasion.
After the opening skirmishes, White emerged with the advantage of a queenside majority, while Black's queen's pawn was isolated and weak.
Forceful play by Fischer annexed the point after 34 moves. It was after this loss, his second straight, that Petrosian became ill, forcing postponement of the eighth game.
Here is the score:
Robert James Fischer vs Tigran Vartanovich Petrosian Fischer - Petrosian Candidates Final (1971), Buenos Aires ARG, rd 7, Oct-19 Sicilian Defense: Kan. Modern Variation (B42) 1-0 https://www.chessgames.com/perl/chessgame?gid=1044351 23. … Rd6
1. e4 c5
Once again Petrosian resorts to the Sicilian Defense which has been a mainstay of his defensive strategy in this match. He appears to have given up the Caro-Kann, at least temporarily.
2. Nf3 e6
3. d4 cxd4
4. Nxd4 a6
Normal, and more aggressive is 4. … N-KB3, but Black seeks untrodden paths.
5. Bd3 Nc6
6. Nxc6 bxc6
This capture does nothing for Black's pawn structure, so 4. … QPxN was to be considered.
7. O-O d5
8. c4 …
Now, after ensuing exchanges, Black will be burdened with weak, isolated queenside pawns. Now came
8. … Nf6
9. cxd5 cxd5 (10. … NxP; 11. B-K4 and 12. R-K might prove annoying)
10. exd5 exd5
11. Nc3 Be7
12. Qa4+ Qd7 (“inviting” White to win the exchange — 13. B-QN5, PxB; 14. QxR, O-O! after which Black has all the play)
13. Re1 …
White continues aggressively, sidestepping dubious offers.
13. … Qxa4
14. Nxa4 Be6
15. Be3 O-O
Black hardly can be pleased with the game he has obtained from his opening tactics.
16. Bc5 Rfe8
17. Bxe7 Rxe7
18. b4 Kf8
19. Nc5 Bc8
20. f3 Rea7
and there followed:
21. Re5 Bd7
22. Nxd7+ …
Further exchanges can only benefit White who now enjoys a marked advantage.
22. … Rxd7
23. Rc1 Rd6
24. Rc7! …
This intrusion by White's rook signals the beginning of the end.
24. … Nd7
25. Re2 g6
26. Kf2 h5
27. f4 h4
28. Kf3 f5
29. Ke3 d4+
30. Kd2 Nb6
31. Ree7 …
Once White's rooks are doubled on the seventh rank, Black has no suitable defense.
31 … Nd5
32. Rf7+ Ke8
33. Rb7 Nxf4
34. Bc4 Resigns
